Normally, surfaces in the body are in contact, not being pulled apart. The tissues don't grow with space to be pulled apart, so when you do pull them apart, any normal connective tissue gets abnormally pulled apart and looks like "fuzz".

Well, if it happened everywhere he wouldn't be noting it. It is the fact that it is present in certain locations predictably (and absent in certain locations predictably) that is interesting. He also claimed that its ectopic presence is correlated with pathological states. That's kind of interesting.

At any rate I have no experience with human cadavers, and I don't want to over-defend this guy. I just think it's worth piggy-backing on his experience, considering his chance to dissect humans with an eye toward connective tissue development.